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A Descriptive Catalog of Selected Aerial Photographs of Geologic Features in the United States
The U.S. Geological Survey has selected and assembled sets of photographs that illustrate numerous types of geologic features in the United States. This catalog lists these special sets of photographs that are available for purchase and describes the features illustrated. One reduced photograph from each set is shown on the back pages of this catalog to assist the purchaser in his selection. -- pg. 1.
Upper Cenozoic Deposits of the Central Delmarva Peninsula, Maryland and Delaware
Upper Tertiary deltaic and shallow-water marine deposits form the backbone of the peninsula. The oldest marine deposits of Pleistocene age reach a maximum altitude of 15 meters (50 feet) and have been dated radiometrically at about 100,000 years.
The Parsonsburg Sand in the Central Delmarva Peninsula, Maryland and Delaware
Sandy and peaty sediments suggest that the climate of the Delmarva Peninsula was cooler and drier during the late Wisconsin than it is at present.
Alluvial Fans in the Death Valley Region, California and Nevada
A survey and interpretation of some aspects of desert geomorphology.
Sand Dunes on the Central Delmarva Peninsula, Maryland and Delaware
During the maximum advance of the late Wisconsin ice sheets, an environment cooler and drier than the present one permitted dune building on the Delmarva Peninsula.
